RE: Man inside sphere electrode (electrum)

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Terry Fritz" <teslalist-at-qwest-dot-net>

Hi Ryan,

The Electrum only runs at 38kHz.  Skin effect is not very great!

Skin effect is sort of a "myth" as it turns out for Tesla coils.  Since the 
body's resistance is so high, even at like 200kHz the "skin depth" is like 
1 meter!!  So unless one is really fat, skin depth is not a factor.

The reason people do not "feel" high frequency currents is that the nerves 
do not polarize and register the pain.  So you may not feel the current, 
but the "frying effect" is there.  RF currents tend to travel in blood 
vessels and nerves.  When one is stuck by lightning, the blood vessels and 
nerves are often visibly fried causing "Lichtenberg" burns in the 
skin.  Fortunately, the heart and lungs do not feel the current either, so 
the chance of typical electrocution from RF is low.  More info is at:

http://hot-streamer-dot-com/TeslaCoils/Safety/safety.htm

Cheers,

         Terry



At 06:32 PM 5/5/2003 -0600, you wrote:
>Hi All,
>
>  In regards to the person inside a faraday cage above a tesla coil... It
>seems that the induced magnetic fields would operate at the same high
>frequencies as the coil itself. Then the induced currents within the person
>would also be high frequency, and have a tendency to pass over the skin...
>
>Ryan
>
>
>
>
>
>
>
>-----Original Message-----
>From: Tesla list [mailto:tesla-at-pupman-dot-com]
>Sent: Monday, May 05, 2003 5:14 PM
>To: tesla-at-pupman-dot-com
>Subject: Re: Man inside sphere electrode (electrum)
>
>
>Original poster: "Terry Fritz" <teslalist-at-qwest-dot-net>
>
>Hi Rik,
>
>At 04:40 PM 5/5/2003 +0000, you wrote:
>
> >Hi all,
> >web surfing i came across this
> >http://www.lod-dot-org/teslacoils.html
> >
> >man sitting in  a cage electrode on top of his large coil.
> >He is safe from electric fields there (well known Faradey cage effect),but
> >i was wondering what about magnetic fields.?
> >I suspect part of magnetic field could enter hollow sphere and induce
> >currents in man's body.
> >How real is danger of that possibility?
> >
> >Rik
>
>The magnetic fields at the top of the coil are not that
>extraordinary.  Maybe 10's of amps.  Greg had an electronic oscilloscope
>with him that was not harmed.  I would guess if people can stand the
>magnetics of MRI machines, they can stand top of Tesla coils easily.  The
>currents in the coil could induce some voltage around one's body.  But the
>resistance of the body is so high the current would be nil.
>
>Cheers,
>
>          Terry